Measuring the point cloud… with a GNSS rover
Takeaways from JTRS Registered Surveyor on the Leica GS18 I GNSS RTK Rover
Author: Renata Barradas
We measure the point cloud.
这是JTR注册测量师的口号。JTRS一直在寻找创新和创新的方法来改善公司提供的测量服务。
The company's latest technology leap is being able to measure the georeferenced point cloud and points with its brand new tech acquisition – theLeica GS18 iGNSS RTK Rover。
"The capability of capturing images at the same time with real-time positioning from a single instrument, really changes the way we carry out surveying – It's a reality capture concept,"explains Jimmy Tan, owner at JTRS.
此外，借助随之而来的倾斜补偿，它有助于获得RTK观察并迅速进行记录，这在夜间工作时像我们必须在机场跑道或MRT高架桥一样有用。当我平整杆子时，我不需要额外的双手来握住火炬光来照亮气泡。”
Beyond measuring the point cloud, the GS18 I has empowered JTRS with a powerful RTK rover that combines fast RTK initialisation, tilt-compensated measurements and Visual Positioning, all in one tool. With GS18 I added to their portfolio, JTRS has been able to provide new services and improve the company's current services.
防弹工作流程
JTRS mostly uses the GS18 I for control surveys and quality checks in utility and construction projects. The tight accuracies needed range from 50mm to 100mm and for most QC projects within 40mm. For each project, the workflow with this versatile RTK GNSS rover is:
- 使用GS18 I和Leica Captivatefield software
- Data processing with office softwareLeica Infinity
- Creating deliverables with: Infinity (to process images to point clouds),Leica JetStream（发布点云）和3D Reshaper（基于点云进行网格建模）。
In Tan's words,"With the GS18 I, I just need to point the camera onto the subject that I want to capture while walking. For example, in one of my projects, the time taken to survey the trial pit with the GS18 I was no more than five minutes. The time taken to post-process in the office using Infinity software was 30 minutes. I can produce true colourised point clouds, which I can export to orthophotos and also create digital surface models. It is also possible to create hundreds of topo points from the georeferenced images quickly and efficiently."
Safety and speed in a trial pit and as-built trench survey
Carrying out trial pit or as-built trench surveys can be very challenging. Surveyors usually need to follow the site contractors' workflow and schedule as the trench needs to be backfilled, and the road lane needs to be re-opened as quickly as possible.
When JTRS was tasked with a utility trench documentation, they saw it as an opportunity to put their new GNSS rover into a true test. Besides doing an as-built survey of trial pits and the underground utilities, the GS18 I allowed them to create a 3D point cloud and sequence it into a 3D mesh model.
The freedom of using both the pole tip and Visual Positioning to measure in the field and using simple workflow for processing in the office, pushes the boundary of surveying for JTRS to another level.
Confidence and accuracy in quality control check surveys
对于一个包括1200个块的3D扫描的建筑物和扫描项目，JTRS与GS18 I进行了地理参与式扫描数据的质量检查I。。"In one of our projects with HDB (Housing Development Board), I was able to pick up coordinates of points captured during my walk using Visual Positioning. With the GS18 I, it is convenient and fast to survey and I can get instant results before leaving the site.
当它是不可能使用极尖因为se it was too close to the building's edge and the RTK signal couldn't initialise we used the Visual Positioning method and walked further away from the building where there is RTK signal. Most of the time, we would use both methods if the site condition enables us to do so,"describes Tan.
Smoother workflow + higher quality deliverables = confident clients
JTRS is now able to work safer and save costs on manpower as the GNSS antenna is operated by only one person. To get ready to use the GS18 I on the field, the team needed no training and just one short introduction on how to process the images in Infinity was required.
"Clients are more confident in the quality of the deliverables. With Infinity, I am able to process the images into true point clouds with accurate georeferencing. With Visual Positioning, I can capture two images per second as I walk, and each image comes with global coordinates from a single source – the GS18 I. It is like flying the drone installed with a GNSS antenna and camera, except we are walking,"sustains Tan.
"Clients are more confident in the quality of the deliverables. With Infinity, I am able to process the images into true point clouds with accurate georeferencing. With Visual Positioning, I can capture two images per second as I walk, and each image comes with global coordinates from a single source – the GS18 I. It is like flying the drone installed with a GNSS antenna and camera, except we are walking,"sustains Tan.
Opening new opportunities by measuring the point cloud
JTRS专门通过3D激光扫描和摄影测量法bob综合app赌博捕获现实。我将GS18添加到公司的座右铭，即用天线允许测量师自由，安全地捕获站点，携带QC的几乎所有数据并创建多个可交付成果。
“我们可以将点云进一步发展为3D网格模型 - 这是现实捕获，并且在可视化方面非常有帮助 - 比单点，单行或2D图更好。使用Infinibob综合app赌博ty，您还可以创建数字表面模型。对于可以在其设计工作中使用此锡型模型并轻松提取高度和轮廓，水流等的工程师或设计师非常有用。”says Tan.
GS18我不仅在帮助改善JTRS提供的当前服务，还可以帮助公司提供新服务。能够更快地创建多个可交付成果，并且资源较少，从而带来了更多的项目机会。
“我们可以将点云进一步发展为3D网格模型 - 这是现实捕获，并且在可视化方面非常有帮助 - 比单点，单行或2D图更好。使用Infinibob综合app赌博ty，您还可以创建数字表面模型。对于可以在其设计工作中使用此锡型模型并轻松提取高度和轮廓，水流等的工程师或设计师非常有用。”says Tan.
GS18我不仅在帮助改善JTRS提供的当前服务，还可以帮助公司提供新服务。能够更快地创建多个可交付成果，并且资源较少，从而带来了更多的项目机会。
If you want to hear and see more,listen to our webinar吉米的高手。
Leica GS18 i
Versatile, survey-grade GNSS RTK rover with Visual Positioning. Capture the site in images and measure points from them, either in the field or later in the office.